1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * KVM Microsoft Hyper-V emulation 4 * 5 * derived from arch/x86/kvm/x86.c 6 * 7 * Copyright (C) 2006 Qumranet, Inc. 8 * Copyright (C) 2008 Qumranet, Inc. 9 * Copyright IBM Corporation, 2008 10 * Copyright 2010 Red Hat, Inc. and/or its affiliates. 11 * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com> 12 * 13 * Authors: 14 * Avi Kivity <avi@qumranet.com> 15 * Yaniv Kamay <yaniv@qumranet.com> 16 * Amit Shah <amit.shah@qumranet.com> 17 * Ben-Ami Yassour <benami@il.ibm.com> 18 * Andrey Smetanin <asmetanin@virtuozzo.com> 19 */ 20 21 #ifndef __ARCH_X86_KVM_HYPERV_H__ 22 #define __ARCH_X86_KVM_HYPERV_H__ 23 24 #include <linux/kvm_host.h> 25 26 /* 27 * The #defines related to the synthetic debugger are required by KDNet, but 28 * they are not documented in the Hyper-V TLFS because the synthetic debugger 29 * functionality has been deprecated and is subject to removal in future 30 * versions of Windows. 31 */ 32 #define HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS 0x40000080 33 #define HYPERV_CPUID_SYNDBG_INTERFACE 0x40000081 34 #define HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES 0x40000082 35 36 /* 37 * Hyper-V synthetic debugger platform capabilities 38 * These are HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX bits. 39 */ 40 #define HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING BIT(1) 41 42 /* Hyper-V Synthetic debug options MSR */ 43 #define HV_X64_MSR_SYNDBG_CONTROL 0x400000F1 44 #define HV_X64_MSR_SYNDBG_STATUS 0x400000F2 45 #define HV_X64_MSR_SYNDBG_SEND_BUFFER 0x400000F3 46 #define HV_X64_MSR_SYNDBG_RECV_BUFFER 0x400000F4 47 #define HV_X64_MSR_SYNDBG_PENDING_BUFFER 0x400000F5 48 #define HV_X64_MSR_SYNDBG_OPTIONS 0x400000FF 49 50 /* Hyper-V HV_X64_MSR_SYNDBG_OPTIONS bits */ 51 #define HV_X64_SYNDBG_OPTION_USE_HCALLS BIT(2) 52 53 static inline struct kvm_vcpu_hv *vcpu_to_hv_vcpu(struct kvm_vcpu *vcpu) 54 { 55 return &vcpu->arch.hyperv; 56 } 57 58 static inline struct kvm_vcpu *hv_vcpu_to_vcpu(struct kvm_vcpu_hv *hv_vcpu) 59 { 60 struct kvm_vcpu_arch *arch; 61 62 arch = container_of(hv_vcpu, struct kvm_vcpu_arch, hyperv); 63 return container_of(arch, struct kvm_vcpu, arch); 64 } 65 66 static inline struct kvm_vcpu_hv_synic *vcpu_to_synic(struct kvm_vcpu *vcpu) 67 { 68 return &vcpu->arch.hyperv.synic; 69 } 70 71 static inline struct kvm_vcpu *synic_to_vcpu(struct kvm_vcpu_hv_synic *synic) 72 { 73 return hv_vcpu_to_vcpu(container_of(synic, struct kvm_vcpu_hv, synic)); 74 } 75 76 static inline struct kvm_hv_syndbg *vcpu_to_hv_syndbg(struct kvm_vcpu *vcpu) 77 { 78 return &vcpu->kvm->arch.hyperv.hv_syndbg; 79 } 80 81 int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host); 82 int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host); 83 84 bool kvm_hv_hypercall_enabled(struct kvm *kvm); 85 int kvm_hv_hypercall(struct kvm_vcpu *vcpu); 86 87 void kvm_hv_irq_routing_update(struct kvm *kvm); 88 int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint); 89 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector); 90 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages); 91 92 void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu); 93 void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu); 94 void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu); 95 96 bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu); 97 bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu, 98 struct hv_vp_assist_page *assist_page); 99 100 static inline struct kvm_vcpu_hv_stimer *vcpu_to_stimer(struct kvm_vcpu *vcpu, 101 int timer_index) 102 { 103 return &vcpu_to_hv_vcpu(vcpu)->stimer[timer_index]; 104 } 105 106 static inline struct kvm_vcpu *stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stimer) 107 { 108 struct kvm_vcpu_hv *hv_vcpu; 109 110 hv_vcpu = container_of(stimer - stimer->index, struct kvm_vcpu_hv, 111 stimer[0]); 112 return hv_vcpu_to_vcpu(hv_vcpu); 113 } 114 115 static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu) 116 { 117 return !bitmap_empty(vcpu->arch.hyperv.stimer_pending_bitmap, 118 HV_SYNIC_STIMER_COUNT); 119 } 120 121 void kvm_hv_process_stimers(struct kvm_vcpu *vcpu); 122 123 void kvm_hv_setup_tsc_page(struct kvm *kvm, 124 struct pvclock_vcpu_time_info *hv_clock); 125 126 void kvm_hv_init_vm(struct kvm *kvm); 127 void kvm_hv_destroy_vm(struct kvm *kvm); 128 int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args); 129 int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid, 130 struct kvm_cpuid_entry2 __user *entries); 131 132 #endif 133